*{
  margin: 0;
  padding: 0;
}
.bg{
  width: 100%;
  height: 100%;
  overflow: hidden;
  background-image: url(../img/1.png);
  background-repeat: no-repeat;
  background-size: cover;
  position: relative;
}
@media screen and (min-width:600px) {
  .loginContain{
    position: absolute;
    left: 50%;
    top: 20%;
    transform: translate(-50%);
    width: 400px;
    padding: 40px;
    background: rgba(255, 255, 255,.1);
    box-sizing : border-box;
    box-shadow: 0 15px 25px rgba(0,0,0,.5);
	  border-radius: 10px;
  }
  .Header{
    text-align: center;
    background-color: transparent;
    margin-right: 0 auto;
    color: #fff;
  }
  .input_box{
    position: relative;
  }
  .input_box input{
    width: 100%;
    padding: 10px 0;
    font-size: 16px;
    color: #fff;
    letter-spacing: 1px;
    margin-bottom: 30px;
    border: none;
    border-bottom: 1px solid #fff;
    outline: none;
    background: transparent;
  }
  .code_img{
    cursor: pointer;
  } 
  .input_box label{
    position: absolute;
    top:0;
    left: 0;
    padding: 10px 0;
    letter-spacing: 1px;
    font-size: 16px;
    color: #fff;
    pointer-events: none;
    transition: .5s;
  }
  .login,.updata{
    border: none;
    outline:none;
    color: #fff;
    background: #03a9f4;
    font-size: 12px;
    padding: 10px 20px;
    margin: 0 10px;
    cursor:pointer;
    border-radius: 5px;
    box-shadow: 5px 5px 5px 5px rgba(0,0,0,.3);
  }
  .login:active,.updata:active{
    box-shadow: none;
  }
  .input_box input:focus ~ label,.input_box input:valid ~ label {
    top:-18px;
    left:0;
    color:#03a9f4;
    font-size: 12px;
  }
}
@media screen and (max-width:600px) {
  .bg{
    background-image: url(../img/15.jpg);
  }
  .loginContain{
    display: block;
    width: 90%;
    margin: 30% auto;
    padding: 20px 40px;
    background: rgba(255, 255, 255,.1);
    box-sizing : border-box;
    box-shadow: 0 15px 25px rgba(0,0,0,.5);
	  border-radius: 10px;
  }
  .Header{
    text-align: center;
    background-color: transparent;
    margin-right: 0 auto;
    margin-bottom: 10px;
    color: #fff;
  }
  .input_box{
    position: relative;
  }
  .input_box input{
    width: 100%;
    padding: 5px 0;
    font-size: 12px;
    color: #fff;
    letter-spacing: 1px;
    margin-bottom: 30px;
    border: none;
    border-bottom: 1px solid #fff;
    outline: none;
    background: transparent;
  }
  .input_box label{
    position: absolute;
    top:0;
    left: 0;
    padding: 10px 0;
    letter-spacing: 1px;
    font-size: 12px;
    color: #fff;
    pointer-events: none;
    transition: .5s;
  }
  
  .code_img{
    cursor: pointer;
  } 
  .login,.updata{
    border: none;
    outline:none;
    color: #fff;
    background: #03a9f4;
    font-size: 12px;
    padding: 5px 10px;
    margin: 0 5px;
    cursor:pointer;
    border-radius: 3px;
    box-shadow: 2px 2px 2px 2px rgba(0,0,0,.3);
  }
  .login:active,.updata:active{
    box-shadow: none;
  }
  .input_box input:focus ~ label,.input_box input:valid ~ label {
    top:-18px;
    left:0;
    color:#03a9f4;
    font-size: 12px;
  }
}